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For Canon EF, EF-M, and RF Lenses    Manufacturer Service Plan    Accidental Damage Protection    Additional Hardware Coverage    Priority Service & Free Two-Way Shipping

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Related Questions and Answers

Q: 1. i bought this product attached lens one side ok other side not able to remove the lens?

A: I have attached two lens all the time with no problem removing either lens. I was late in responding because I wanted to test the flipper in cold weather with two lens to see if weather had any effect on the flipper but it does not.As with any lens mounting just be careful to align the dots on the lens with the dots on the flipper. I hope this answers your question.

Q: 2. Are there caps on this? I am concerned about dust. Without caps my concern is you have a little cup pointing up catching dust, you put the lens on and flip it, dust falls onto rear of lens, put lens back on camera, dust in camera.

A: there are no provided caps....you could use a camera body cap or use two lenses so that it's always covered ...just a note--the camera body caps don't fit very tight...at least mine don't...

Q: 3. Is this the only way to update the lens firmware?

A: The Sigma USB Dock for Canon EF-Mount Lenses is the only for you to update the firmware on a Sigma lens.

Q: 4. Just to be really clear, this will allow me to use an RF mount lens on an EF mount body? It says compatible with Jupiter lenses, but they are PL or EF, not RF.

A: The Sirui Jupiter EF-RF Adapter for Canon RF Lenses to Canon EF Cameras is only compatible with Sirui Jupiter cine lenses.

Q: 5. Can I use this dock to make my Sigma Art Zooms parfocal (or as close to it as possible)? Both of mine (18-35 & 50-100) came with some breathing and I've seen a number of videos demonstrating parfocality on others' art zooms.

A: I have never done video.

Q: 6. is the dock the only way to update this lens?

A: Not sure which lens you are referring to but the dock is needed for several Sigma art lenses.

Q: 7. Would this product hold up to having two large L telephoto lenses attached all day on a long hot day outside? Can the plastic hold up to it? I was just thinking if a person became good at this change-over system, this could hold the 2nd and 3rd lenses, counting the 1st on the camera body. Is there anything that tells of a maximum weight or anything that would prevent this?

A: Holding two lens would not hang or balance as good on the side of your body. I first researched the product on the manufactures webpage. The center ring is all metal and there was a video of a man hanging off the strap. Who knows if it was not a lucky try and many breaks, but it shows the center is quite strong. The lens mount strength are all in the screws holding the metal rings to the body but it looks strong enough to support a large lens over time. I have only briefly owned mine but it seems to be a well made product. One dropped expensive lens would be too much bad press for such a company, I would think.

Q: 8. this works for the blackmagic 6k g2 (Ef mount)?? or what model will allow me to use an RF mount lens on this Ef mount body?

A: The Sirui Jupiter EF-RF Adapter for Canon EF Lenses to Canon RF Cameras is not compatible with the Blackmagic 6k g2 (Ef mount). Currently there are no adapters that would allow an RF lens to be used on an EF camera.

Q: 9. Would this work with a 10mm fisheye f/2.8 EX DC HSM bought back in 2010?

A: No this would not work. This dock is only compatible with the Sigma Art, Contemporary, and Sports line lenses.

Q: 10. how to you adjust the physical iris with this?

A: The Sirui Jupiter EF-RF Adapter for Canon EF Lenses to Canon RF Cameras is a manual lens adapter and does not provide any electronic communications between the lens and camera body. A lens with manual focus and aperture control rings is recommended, such as the Venus Optics Laowa 15mm f/4 Macro Lens for Canon EF (B&H # VE1540C). This will allow for physical adjustment to the iris while using the lens adapter.